Top Systems Administrator Jobs

Administer and sustain a mission-critical cloud platform built with microservices and containers. Responsibilities include monitoring, deploying, securing, troubleshooting, and maintaining enterprise systems; supporting software engineering teams with design, testing, and sustainment; contributing to architecture reviews and technical planning; resolving production issues; and supporting customer mission needs. The role requires Linux and cloud administration expertise, automation, containerization, infrastructure as code, databases, observability, and an active TS/SCI clearance with polygraph.

Administers, troubleshoots, secures, and maintains containerized application infrastructure. Diagnoses cluster, node, networking, storage, control-plane, and workload issues; manages deployments, scaling, upgrades, patching, image lifecycles, and observability. Creates architecture and configuration documentation, supports security authorizations and compliance artifacts, implements hardening standards, and contributes to CI/CD, Helm, image, registry, and platform operations in classified environments.

Supports enterprise Linux systems by assisting with installation, configuration, patching, monitoring, incident management, compliance audits, vulnerability remediation, certificate deployment, and documentation. Works primarily with RHEL, Red Hat Satellite, Ansible, SolarWinds Orion, and Splunk. The role also supports FISMA and Critical Infrastructure Protection compliance in air-gapped environments and provides legacy application support.

Supports enterprise Linux systems by assisting with installation, configuration, patching, monitoring, incident management, compliance audits, vulnerability remediation, certificate deployment, and system documentation. Works primarily with RHEL, Red Hat Satellite, Ansible, SolarWinds Orion, and Splunk. The role also supports FISMA and Critical Infrastructure Protection compliance in air-gapped environments, legacy applications, and end-user systems. Candidates must be U.S. citizens, obtain Public Trust clearance, and may travel between customer sites.

Supports enterprise Linux systems through installation, configuration, patching, monitoring, incident management, compliance auditing, vulnerability remediation, certificate deployment, and documentation. Assists with RHEL, Red Hat Satellite, Ansible, IDM, MFA, SolarWinds Orion, and Splunk administration. The role also supports air-gapped critical infrastructure, legacy applications, FISMA compliance, and customer-site operations while working toward a Public Trust clearance.

Leads Salesforce administration and the organization’s broader data systems, including Azure SQL databases, integrations, reporting, data governance, and workflow automation. Translates program needs into technical solutions, manages system roadmaps and vendors, oversees data quality and privacy, supports reporting and dashboards, and supervises the Data Services Manager. Provides training, documentation, technical troubleshooting, and guidance on AI and technology initiatives across youth services, education, health, and operational programs.

Administer and modernize hybrid Linux and AWS environments supporting classified and unclassified DoD test-range systems. Responsibilities include RHEL, CentOS, and Ubuntu administration; AWS infrastructure deployment; Ansible, Terraform, or CloudFormation automation; STIG hardening and vulnerability remediation; CI/CD and DevSecOps support; network and performance troubleshooting; identity and access management; and Agile collaboration. The role is part-time and fully onsite in China Lake, California.

Administer enterprise storage and backup systems, including monitoring, troubleshooting, server and VM backup integration, appliance break-fix coordination, SAN zoning, disk array support, vulnerability patching, and SSP reauthorization support. The role works closely with customers, the ISSO, and a cross-disciplinary technical team.

Administers, maintains, monitors, and secures enterprise network infrastructure across multiple platforms. Configures Cisco networking technologies, firewalls, VPNs, wireless systems, and monitoring tools; troubleshoots complex network issues; implements security controls; and supports availability, performance, and compliance. Collaborates with network engineering, IT operations, and security teams while documenting environments, developing procedures, and potentially training junior staff and end users.

Provides IT support in collateral and Special Access Program environments, troubleshooting DoD client systems, managing user accounts and permissions, and resolving service requests. Supports SharePoint collaboration sites, SAP applications, COMSEC equipment including TACLANEs and ViPERs, and security-compliant system access. Requires extensive enterprise IT experience, DoD 8140 certification, U.S. citizenship, and Secret clearance with SAP eligibility. The role is based at Eglin AFB and requires 5–10% travel.

Administer and maintain enterprise Windows and Linux systems, VMware virtualization, Active Directory, storage, identity services, cloud platforms, and endpoints. Perform patching, configuration, hardware installation, monitoring, troubleshooting, vulnerability remediation, system hardening, and security compliance. Support Azure, AWS, and GCP modernization initiatives, resolve Tier-2 issues, document operations, and collaborate with senior engineers and cybersecurity teams.

Administers company-wide IT infrastructure, including networks, servers, software, storage, devices, firewalls, email, backups, and disaster recovery. Troubleshoots hardware and systems issues, manages asset records and vendors, performs upgrades and security maintenance, supports users and onboarding, delivers training, and assists with IT reporting, procurement, and projects. Requires travel among company locations, occasional after-hours work, and responsibility for maintaining secure, reliable technology operations.

Owns and continuously improves NOBULL’s cloud, identity, endpoint, network, collaboration, and security platforms. Responsibilities include administering Microsoft and cloud environments, managing access and endpoint security, investigating incidents, handling vulnerability management and patching, developing PowerShell and Python automations, supporting disaster recovery, managing vendors, documenting procedures, and serving as a Tier 2 and Tier 3 escalation resource. The role also provides technical mentorship and supports compliance, governance, and platform lifecycle decisions.

Administer and secure enterprise Red Hat Linux infrastructure across physical and virtualized environments. Responsibilities include provisioning, patching, repository management, Ansible automation, DISA STIG compliance, vulnerability remediation, troubleshooting, monitoring, documentation, and technical support for defense modeling, simulation, and C4I exercise systems.

Owns IT systems administration and security operations for a fully remote workforce. Responsibilities include managing Microsoft 365 and Google Workspace, endpoint and identity platforms, security tools, access controls, threat monitoring, incident response, vulnerability management, compliance evidence, disaster recovery, vendor relationships, reporting, and operational roadmaps.

Administers enterprise IT infrastructure across Windows systems, Active Directory, VMware virtualization, Cisco networking, and NetApp storage. Responsibilities include installation, configuration, patching, monitoring, troubleshooting, security baseline implementation, documentation, data center support, and coordination with vendors and cybersecurity teams. The role supports classified infrastructure, leads selected assignments and junior staff, requires a TS clearance and polygraph, and involves approximately two weeks of annual travel with occasional after-hours support.

Installs, configures, administers, supports, and troubleshoots Windows clients, servers, hardware, software, networking equipment, printers, and mobile devices across company facilities. Provides escalated end-user support, tests and upgrades software and hardware, repairs equipment, maintains documentation, and supports security and application usability. Requires strong communication, problem-solving, networking, scripting, software maintenance, cable termination, and vendor relationship skills.

Supports approximately 125 users across multiple fire district facilities. Responsibilities include troubleshooting Windows devices, hardware, mobile devices, printers, phones, and AV; administering Microsoft 365, Entra ID, Intune, Azure, and Meraki systems; monitoring backups; supporting security hygiene, access control, onboarding, and automation; documenting resolutions; and coordinating with vendors and partner agencies. The role requires regular interfacility travel, occasional after-hours support, and the ability to grow into a senior systems administration position.

Support and maintain IT infrastructure, endpoints, operating systems, user accounts, virtual machines, and security tools. Responsibilities include onboarding and offboarding, patch management, vulnerability scanning and remediation, compliance tracking, scripting automation, server installation and decommissioning, rack organization, and cable management. The role requires Linux administration, Windows and Microsoft 365 management, virtualization, cloud familiarity, firewall knowledge, and hands-on data center experience.

Administer LangChain’s SaaS, identity, access, MDM, and endpoint environments. Manage Okta, RBAC, provisioning, hardware lifecycle, licenses, configurations, and employee support across hardware, software, networking, and SaaS tools. Develop API integrations, scripts, workflows, and automation to reduce manual work. Build tooling, playbooks, documentation, and knowledge for an AI ITSM agent. Support a growing startup environment with hands-on troubleshooting and scalable IT operations.

Manages AWS infrastructure, including EC2, EBS, VPC, security groups, and IAM. Monitors performance, troubleshoots issues, enforces security controls, automates administrative tasks with Python, Bash, AWS CLI, and CloudFormation, and maintains backup and recovery procedures. Collaborates with development, operations, and security teams supporting multiple networks and security domains for an Intelligence Community customer.

Designs, implements, and administers dealership computer, network, telephony, security, and cloud systems. Maintains Windows Server, Cisco infrastructure, Cisco Webex, AWS, backups, disaster recovery, security controls, and virtualization. Plans upgrades and migrations, monitors system performance, resolves escalated technical issues, supports users, documents configurations, and ensures reliable technology operations across dealership locations.

Installs, configures, monitors, and maintains servers, PCs, mobile devices, networks, wireless systems, applications, cloud services, and backups. Provides remote, phone, and on-site technical support, resolves escalated tickets, troubleshoots hardware and software failures, applies updates, performs security checks, and supports HIPAA compliance. Coordinates infrastructure recovery, maintains ticketing records, collaborates with regional teams, and assists with technical task delegation.

Provides administration and operational support for physical and virtualized Windows and Linux servers, network systems, telecommunications, VPN connectivity, backups, and courthouse applications. Manages VMware environments, Exchange, MECM, patching, system upgrades, hardware lifecycles, vendor coordination, and network accreditation requirements. Supports vulnerability remediation, ATO renewals, RMF documentation, and troubleshooting of communications infrastructure and mission-critical court systems.

Own and administer secure infrastructure supporting aerospace and defense manufacturing, including license servers, GCC High, Windows/Linux servers, identity, endpoints, backups, patching, disaster recovery, and engineering CAD/PLM systems. Partner with cloud and network engineering teams on hybrid identity, AWS GovCloud integration, endpoint compliance, and secure data flows. Maintain CMMC Level 2 and ITAR audit readiness, infrastructure availability, vulnerability remediation, and standardized systems administration processes.